Networking Description
Figure 3-1 shows a network using a spine-leaf architecture in multi-level M-LAG interconnection mode. A service server is dual-homed to server leaf nodes. This document only describes the configuration baseline for the network devices highlighted in yellow.
Service Server
The service server is dual-homed to the server leaf nodes. The two links work in active/standby or LACP load sharing mode and are bound on the service server side.
Server Leaf Node
Two server leaf nodes set up an M-LAG and connect to spine nodes in an M-LAG.
An independent DAD link is deployed between the two leaf nodes.
Spine Node
Two spine nodes set up an M-LAG and connect to the server leaf nodes in the M-LAG.
An independent DAD link is deployed between the two spine nodes and functions as a Layer 3 uplink backup path. When the uplink fails, traffic is forwarded through the backup path to ensure reliability.
The spine nodes are connected to external networks (such as a remote management network), which is not described in this document. The following uses a static routing solution as an example.